Calcium sulfoaluminate composite binders

摘要

The present invention relates to composite binders containing calcium sulfoaluminate cement and supplementary cementitious material, wherein a weight ratio of calcium sulfate to the sum of ye'elimite, aluminates and ferrites (R $/(Y+A+F) ) ranges from 0.5 to 0.9, to a method of manufacturing them comprising the steps:
a) providing at least one calcium sulfoaluminate cement
b) providing at least one supplementary cementitious material
c) mixing 10 to 90 % by weight calcium sulfoaluminate cement(s) with 10 to 90 % by weight supplementary cementitious material(s),
and to their use for making hydraulically setting building materials and special construction chemical compositions.